FURVERT!

anal anal_penetration animal_genitalia anthro anus balls bed blush brown_body brown_fur by_dream canid canine canis collar cutaway domestic_dog domestic_ferret duo elude erection farris_(redspore)fully_sheathed fur furniture genitals hi_res hybrid knot male male/male mammal mustelid musteline on_bed penetration penis penis_tip pink_anus pink_penis red_knot red_penis sheath sheathed_while_penetrated true_musteline weasel